How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 1/11100.0*Chance in playoffs100.0*Promoted100.0*Average seed
Toulouse 35 Treviso 14 -0.0
Week of 1/18100.0*Chance in playoffs100.0*Promoted100.0*Average seed
Treviso 17 Ospreys 14 +0.2
Munster 29 Racing Métro 6 Out
Tigers 9 Toulouse 5 Out
Chiefs 20 Leinster 29 +0.3
Games Above .500
Chance Will Make Playoffs